Fibrinopeptide
(Redirected from
Fibrinopeptide B
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IUPAC name
(4S)-4-[[2-[[(2S)-2-[[(2S)-2-[[(2S)-2-aminopropanoyl]amino]-3-carboxypropanoyl]amino]-3-hydroxypropanoyl]amino]acetyl]amino]-5-[[2-[[(2S)-3-carboxy-1-[[(2S)-1-[[1-[[(2S)-1-[[(2S)-4-carboxy-1-[[2-[[2-[[2-[[(2S)-1-[[(1S)-1-carboxy-4-(diaminomethylideneamino)butyl]amino]-3-methyl-1-oxobutan-2-yl]amino]-2-oxoethyl]amino]-2-oxoethyl]amino]-2-oxoethyl]amino]-1-oxobutan-2-yl]amino]-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-1-oxopropan-2-yl]amino]-2-oxoethyl]amino]-5-oxopentanoic acid
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Other names
Fibrinopeptide A; Fibrinopeptide A (human); FpA; FPA
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Identifiers | |
3D model (
JSmol ) |
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ChemSpider | |
PubChem CID
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Properties | |
C63H97N19O26 | |
Molar mass | 1536.57 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Names | |
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IUPAC name
(4S)-4-[[(2S)-2-[[(2S)-4-amino-2-[[(2S)-2-[[(2S)-4-amino-2-[[(2S)-3-methyl-2-[[2-[[(2S)-5-oxopyrrolidine-2-carbonyl]amino]acetyl]amino]butanoyl]amino]-4-oxobutanoyl]amino]-3-carboxypropanoyl]amino]-4-oxobutanoyl]amino]-4-carboxybutanoyl]amino]-5-[[2-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(1S)-4-carbamimidamido-1-carboxybutyl]amino]-1-oxopropan-2-yl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-2-oxoethyl]amino]-5-oxopentanoic acid
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Other names
Fibrinopeptide B; Fibrinopeptide B (human); FpB; FPB
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Identifiers | |
3D model (
JSmol ) |
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ChemSpider | |
PubChem CID
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Properties | |
C66H93N19O25 | |
Molar mass | 1552.569 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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The fibrinopeptides, fibrinopeptide A (FpA) and fibrinopeptide B (FpB), are
fibrous glycoprotein fibrinogen (factor I) and are cleaved by the enzyme thrombin (factor IIa) to convert fibrinogen into covalently-linked fibrin (factor IA) monomers.[1][2] The N-terminal FpA is cleaved from the Aα chains of fibrinogen and FpB from the Bβ chains of fibrinogen, with FpA released before FpB.[3][4] Subsequent to their formation, fibrin monomers are converted to cross-linked fibrin polymers by the action of thrombin-activated factor XIII (fibrin stabilizing factor), and these fibrin polymers form the backbone of a thrombus (blood clot).[2] Hence, the fibrinopeptides are sensitive markers of fibrinogenesis (fibrin generation), thrombin activity, and coagulation.[5][6][7][8]
FpA is a 16-amino acid peptide.[8] The half-life of FpA is very short at approximately 3 to 5 minutes.[5][8] Hence, FpA levels provide a relatively transient measure of coagulation activation.[8]
Levels of FpA increase with age.